Chisel for removing boiler tubes



June 4, 1940. I KLE|N 2,203,158

CHISEL FOR REMOVING BOILER TUBES Filed Dec. 17, 1938 EN VENTOR Jszdor' Klezn.

BY? ATTORNEY Patented June 4, ie4o 2,203,158

UNITED STATES PATENT OFFECE CHISEL FOR REMOVING BOILER TUBES Isidor Klein, New York-N. Y.

Application December 17, 1938, Serial No. 246,383

Claims. (Cl. 30- 168) This invention relates to new and useful imeg a y p d p the Said top Side and provements in a chisel for removing boiler tubes. has its front edge I4 set in from the sa d pointed The invention has for an object the construcfront tip l3 and formed with a knife cutting edge. tion of a chisel as mentioned which is characterhe point d from; t l 93 is formfid y a pair 5- ized by a shank having a beveled front .end. porof curved top surfaces 13 disposed on both sides 5 tion with a rounded bottom side and an upwardof the center line thereon. These curved surfaces 1y inclined top side, and provided with a vertical connect with a small flattened area I5 at the base wall having a pointed tip arranged in a novel of e Vertical knife e e e W M manner. thickens out at its rear portion I4 where it More specifically, the invention proposes to fl ws into t e body of t e Shank Y 0" arrange the vertical wall with a pointed tip to In Figs. 4 and 5 a portion of a boiler is illussimulate a knife edgechisel capable of slitting a trated which includes a wall I6 throu Which boiler tube. one end of the boiler tube ii is mounted. The

It is proposed to arrange the upwardly inclined end of this tube is formed with a coiled portion top side of the beveled front portion in a man- U The chisel is used in the following manner: 15'' nor to collapse a portion of the boiler tube and First a portion of the coiled edge li of the boiler so assist in decreasing its diameter so that it may is cut oil. Then the pointed tip I3 is engaged be easily removed from the boiler. between the surface of the opening in the wall Still further the invention proposes the pro- 6 for the tube il and the outer face of the vision of a novel chisel member vertically adjusttube ii. The chisel is driven inwards until it 20 ably mounted on the vertical wall for guiding the reaches the position. shown in Fig. 4. It should edge portions of the boiler tube which is being be noted that a portion of the edge of the tube I! cut by the vertical wall along said inclined top is being wedged upwards. Soon this edge engages side. v the sharpened vertical wall M. Then this edge is For further comprehension of the invention, cut by the wall as indicated in Fig. 5. It should 25 and of the objects and advantages thereof, refbe noted that the outer end of the boiler tube erence will be had to the following description is being reduced in diameter by the cutting and and accompanying drawing, and to the appended bending of the end portion thereof. This will claims in which the various novel features of permit its disengaging from the wall I6.

the invention are more particularly set forth. In Figs. 6-8 inclusive, 2. modification of the in- 30 In the accompanying drawing forming a mate vention has been disclosed which distinguishes rial part of this. disclosure: from the prior form merely in the fact that a Fig. 1 is a perspective view of a chisel conbaifie member i8 is vertically adjustably mounted structed according to this invention. on the said vertical wall It and is adapted to Fig. 2 is a side elevational view of Fig. 1. guide the edge portions of the boiler tube being 35 Fig. 3 is a plan view looking in the direction of cut. This bafiie member has a top wall portion the line 3-3 of Fig. 2. 18 which extends across the top of the. wall I4 Fig. 4 is a vertical sectional view of a portion and has a pair of depending wall portions l of the boiler showing the chisel at the start of which extend along the side faces of the wall [4.

40 removing one of the tubes. These Wall portions lB have their front edges 40 Fig. 5 is a view similar to Fig. 1 but showing curved so that there is a bottom upwardly prothe chisel further advanced. jecting portion It. The wall portions l8 ter- Fig. 6 is a side elevational view of a chisel minate at the bottom in flanges I9. Several constructed according to a modification of this threaded openings 20 are formed in the sides of 5 invention. the wall M. and are engageable by screws or other Fig. 7 is a plan view of Fig. 6. fastening elements 25 engaged through the wall Fig. 8 is a vertical sectional View taken on the portion ill and adapted to hold the baflle member line 88 of Fig. 6. in desired vertically fixed positions.

The chisel for removing boiler tubes, according When the chisel is used for removing a tube th to this invention, includes a shank portion l0 sides of the out portion of the tube will engage 50 having a rear end Ill to be hammered upon to beneath the flanges i9 and will be forced along drive the chisel forwards. The shank has afront the upwardly inclined top side l2. The bam end portion H3 which has a rounded bottom'side member l8 may be adjusted vertically to various II and an upwardly inclining top side I2, and at positions to adapt the vbaffle for boiler tubes of pointed front tip l3. A vertical wall I4 is indifferent gauge material. For a thinner gauge 55 tube the bafile member is moved downwards to decrease the distance between the flanges I9 and the upwardly inclining top side I2.

While I have illustrated and described the preferred embodiments of my invention, it is to be understood that I do not limit myself to the precise constructions herein disclosed and the right is reserved to all changes and modifications coming within the scope of the invention as defined in the appended claims.

Having thus described my invention, what I claim as new, and desire to secure by United States Letters Patent is:

1. A chisel for removing boiler tubes, comprising a shank having a beveled front end portion with a round bottom side and an upwardly inclining top side, and a pointed front tip, and a vertical wall on said top side and having its front edge set in from said pointed front tip and formed with a knife cutting edge, a small area in said upwardly inclining top side at the base of said vertical wall being flattened.

2. A chisel for removing boiler tubes, comprising a shank having a beveled front end portion with a round bottom side and an upwardly inclining top side, and a pointed front tip, and a vertical wall on said top side having its front edge set in from said pointed front tip and formed with a knife cutting edge, and a bafile member vertically adjustably mounted on said vertical wall for guiding the edge portions of a boiler tube being cut by the vertical wall along said inclined top side.

3. A chisel for removing boiler tubes, compris- *ing a shank having a beveled front end portion with a round bottom side and an upwardly inclining top side, and a pointed front tip, and a vertical wall on said top side having its front edge set in from said pointed front tip and formed with a knife cutting edge, and a bafile member vertically adjustably mounted on said vertical wall for guiding the edge portions of a boiler tube being cut by the vertical wall along said inclined top side, said bafile member having a top wall for engaging across the top of said vertical wall, and downward depending side walls extending along the side faces of said vertical wall.

4. A chisel for removing boiler tubes, comprising a shank having a beveled front end portion with a round bottom side and an upwardly inclining top side, and a pointed front tip, and a vertical wall on said top side having its front edge set in from said pointed front tip and formed with a knife cutting edge, and a baiiie member vertically adjustably mounted on said vertical wall for guiding the edge portions of a boiler tube being cut by the vertical wall along said inclined top side, said bafiie member having a top wall for engaging across the top of said vertical wall, and downward depending side walls extending along the side faces of said vertical wall, said side walls having their bottom portions extended downwards forming outwardly directed flanges.

5. A chisel for removing boiler tubes, comprising a shank having a beveled front end portion with a round bottom side and an upwardly inclining top side, and a pointed front tip, and a vertical wall on said top side having its front edge set in from said pointed front tip and formed with a knife cutting edge, and a baffle member vertically adjustably mounted on said vertical wall for guiding the edge portions of a boiler tube being out by the vertical wallalong said inclined top side, said baffle member having a top wall for engaging across the top of said vertical wall, and downward depending side walls extending along the side faces of said vertical wall, said side walls having their bottom portions extended upwards, and formed with outwardly directed flanges, and screws engaging through said side walls and into threaded openings in said vertical wall for holding the baflle member in a fixed position on the vertical wall.

- ISIDOR KLEIN. 

